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Finding the Fourth Proportional to 29,294.70, 40,426.79 and 15,865.92

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Solution

The fourth proportional to 29,294.70, 40,426.79 and 15,865.92 is: 21,895.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,294.70 : 40,426.79 = 15,865.92 : x
  2. Step 2: Convert to fraction form
    29,294.70/40,426.79 = 15,865.92/x
  3. Step 3: Cross multiply
    29,294.70x = 40,426.79 × 15,865.92
  4. Step 4: Simplify right side
    29,294.70x = 641,408,136.67
  5. Step 5: Solve for x
    x = 641,408,136.67/29,294.70
  6. Step 6: Final answer
    x = 21,895.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.